It is confusing about the warranty and modifications issue, for instance, Porsche now do their own short shift which is a full assembly in the cradle which just bolts straight in place, they listed one for the 986/996 which was made outside of the company and also sold under the maker's name elsewhere which had to installed by exchanging the moving parts inside the cradle. If they would say it's ok to do such and such but the line is drawn at a point such as structural modification or if it renders the driveline modified etc then it would be better, the same applies to the grills, they effect nothing regarding weakening or preventing anything from doing it's job as prescribed they are just a protection and we've all used forms of protection for appropriate activities. Maybe some things just need a Porsche approval. Then there have been stories of insurance companies who have been difficult over people using wheels and tyres not approved by Porsche or modified cars in general just where is the line drawn with them? One thing if boosting power output by 50% quite another if improving the suspension or brakes! But both are modifications and we know that good sense goes out the window when dealing with insurance claims. Warranties are backed by insurance companies but one of the advantages of the Porsche warranty is that you have the claim backed by the experts ( Porsche ) and so it's best to be sure they approve of whatever changes you may propose, I'm always glad when good sense prevails as in the two cases above and os I presume that the insurers should have no problem with it.